And while fruits have carbs, these carbs won't give you sustained energy. Your body reacts differently to different carbs, and these are fructose, which give you quick energy, but not sustained. "So if you're going for a pretty lengthy hike," says Dubost, "you can have fruit within the first hour, then go for the cereal or trail mix into the second hour for more sustained energy."
7. Beef Jerky
My personal favorite, beef jerky was on Smith's list of favorites too, (along with canned tuna and crackers). High in protein, low in fat, and very shelf stable for long term packing, like for a weekend of camping, Dubost warns some jerky can be high in sodium. And while that can be bad for the average person, an athlete, or someone working up a good sweat during a several-hour hike or a day of skiing, needs sodium because we lose it when we sweat.
And Never Forget Your Fluids
While not considered a "food," many people seem to forget to pack enough fluid to keep hydrated. And being hydrated is essential, especially on long hikes or during prolonged outdoor exercise. Dehydration can make you feel tired and lethargic, two things you don't want to be out on the trails.